as secretary kerry said and ambassador rice said intervention would be a grave mistake. we call on russia to respect its international obligations made under the u.n. charter to refrain from the threat or use of force against territorial integrity or independence of any state profit live in kiev. katie. >> we're getting reports airspace over crimea has been closed. armed men in combat uniforms have seized the international airport there as well as a military airfield in that region. similarly reports from a tv station, crimea tv, their editor in chief says their building has been tormd by armed men. a teleconcompany in the region says they are unable to contact their units in the crimea. the british foreign office urged all of eight citizens in that region to leave the area by commercial means. if you heard the white house saying they are investigating, seeking classification on the origin of these armed men and warning in strongest possible terms any intervention they say would be a grave mistake. moscow denies these are their troops, these are people, defense militia m